Message sign board



FIG. 1 is a front elevational view of a message sign board showing our new design, with the broken line showing for illustrative purposes only and forming no part of the claimed design, with the rear being flat and unornamented;

FIG. 2 is a right side elevational view thereof, with the opposite side being a mirror image;

FIG. 3 is a front elevational view of a second embodiment thereof, with the broken line showing for illustrative purposes only and forming no part of the claimed design, and with the rear being flat and unornamented; and,

FIG. 4 is a right side elevational view thereof, with the opposite side being a mirror image. 

The ornamental design for message sign board, as shown and described. 